How to control grep output intact for each matching line?
I have multiple (~80) files (some can be as big as 30GB of >1 billion of lines!) to grep on a pattern, and piped the match to a single file. I have a 96-core machine so that each grep job was sent to the background to speed up the search:
The input files have uniformly 3 fields each row, so should the output file,
but I found some of the matching lines are broken and the output file became a mess!
It seems to me the problem is from the writing of the pipe, as 80 grep jobs for 80 files are writing to the same output file. By default grep prints matching lines so that I assume each row should be printed as a whole, but it did not in my case.
What is wrong here?
Last edited by yifangt; 10-10-2018 at 02:20 PM..
Reason: typos
I have a script that sorta works the way I want but I would rather
just get the base name and line number from the grep output.
My current script is this one liner:
grep -n "$1" $SCCSPATH/*/s.*.k | cut -c1-80
which if I was searching for 121197 I would get something like this:
... (18 Replies)
Below is the scenario. Help is appreciated.
File1: ( 500,000 lines ) : Three fields comma delimited : Not sorted
1234FAA,435612,88975
1224FAB,12345,212356
File2: ( 4,000,000 lines ) : Six fields comma delimited (Last 3 field should match the 3 fields of File1) : Not Sorted :
... (13 Replies)
Hi all,
I am trying to zgrep / grep list of files so that it displays only the matching filename:line number and does not display the whole line, like:
(echo "1.txt";echo "2.txt") | xargs zgrep -no STRING
If I use -o option, it displays the matching STRING and if not used, displays the... (3 Replies)
Hi all,
Would like to know how I could search for a string 'xyz' but have the output show the line plus the line above and/or below all lines found.
eg. search for xyz from file containing:
abc
12345
asdf xyz asdfds
wwwww
kjkjkj
ppppp
kkkxyz
eeee
zzzzz
and the output to... (2 Replies)
Hi,
I haven't done this for awhile, and further, I've never done it in perl so I appreciate any help you can give me.
I have a file of lines, each with 5 data points that look like this:
AB,N,ALLIANCEBERNSTEIN HLDNG L.P,AB,N
ALD,N,ALLIED CAPITAL CORPORATION,ALD,N
AFC,N,ALLIED CAPITAL... (4 Replies)
Hi all,
I want to display line number for matching string in a file. can anyone please help me.
I used
grep -n "ABC" file
so it displays
6 ABC.
But i only want to have line number,i don't want that it should prefix matching context with line number.
Actually my original... (10 Replies)
Hi All,
In my output file i am getting control m character and also the line feeds at different places and with different combinations, the content of the file is supposed to be in a single line but if there is a line feed in between then from there onwards it's going into new line.
I tried... (7 Replies)
I have a file with a list of references towards the end and want to apply a grep for some string.
text ....
@unnumbered References
@sp 1
@paragraphindent 0
2017. @strong{Chalenski, D.A.}; Wang, K.; Tatanova, Maria; Lopez,
Jorge L.; Hatchell, P.; Dutta, P.; @strong{Small airgun... (1 Reply)
Discussion started by: kristinu
1 Replies
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